CVE-2020-3848 in macOS
Summary
by MITRE
A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.3. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.
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Analysis
by VulDB Data Team • 04/06/2024
The vulnerability identified as CVE-2020-3848 represents a memory corruption flaw that emerged within the macOS operating system ecosystem, specifically affecting versions prior to macOS Catalina 10.15.3. This type of vulnerability falls under the category of memory safety issues that can potentially be exploited by malicious actors to gain unauthorized control over affected systems. The flaw was particularly concerning because it could be triggered remotely, making it accessible to attackers who might not require physical access to target machines.
The technical nature of CVE-2020-3848 stems from insufficient input validation mechanisms within the affected macOS components, which allowed maliciously crafted data to be processed without proper sanitization. When applications or system processes encountered malformed input, the lack of robust validation routines led to memory corruption that could manifest as application crashes or more severe conditions that might enable arbitrary code execution. This vulnerability directly relates to common software security weaknesses documented under CWE-121, which addresses buffer overflow conditions, and CWE-122, which covers buffer overflow vulnerabilities that can lead to memory corruption.
The operational impact of this vulnerability extends beyond simple application instability, as it creates potential entry points for sophisticated attack vectors that could be leveraged by threat actors. Remote exploitation capabilities mean that attackers could potentially compromise systems without requiring user interaction or physical presence, making the attack surface significantly larger. The vulnerability's potential to cause arbitrary code execution places it within the ATT&CK framework's technique T1059, which covers command and scripting interpreters, and could potentially be used as a stepping stone for further system compromise. Organizations relying on macOS systems for critical operations would face increased risk of unauthorized access and data breaches if they failed to apply the necessary security updates.
The remediation for CVE-2020-3848 was implemented through the release of macOS Catalina 10.15.3, which included enhanced input validation procedures designed to prevent the specific memory corruption patterns that led to the vulnerability. System administrators and security teams should prioritize deployment of this update across all affected macOS installations to eliminate the risk of exploitation. The fix demonstrates the importance of continuous security monitoring and timely patch management, particularly for operating system components that handle user input and process external data. Organizations should also implement additional security controls such as network segmentation and application whitelisting to reduce the potential impact of similar vulnerabilities that might not yet be patched. The vulnerability serves as a reminder of the critical need for robust input validation mechanisms in all software components, as these protections form the first line of defense against memory corruption attacks that could lead to complete system compromise.